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The male is creamy white just after emergence, males mature to a pale pastel blue. The upper surface of the thorax has one full length wide antehumeral stripe either side of the centreline. Parallel to this is a second fine stripe; on some specimens this fine line is interrupted by the black outline. On the upper surface of each abdominal segment is a longitudinal line that thickens and splits on segments 7 to 10. These black lines seem to become more intense with age. The tibias of the mid and hind legs are broad white feather like structures and the source of the vernacular name.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
Lat/Lng: 51.2, -1.0
OS grid ref: SU7451